Simplified Approach for Assessing Shear Resistance of Reinforced Concrete Beams under Impact Loads

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Title: Simplified Approach for Assessing Shear Resistance of Reinforced Concrete Beams under Impact Loads

Author(s): De-Bo Zhao, Wei-Jian Yi, and Sashi K. Kunnath

Publication: Structural Journal

Volume: 113

Issue: 4

Appears on pages(s): 747-756

Keywords: beam; impact behavior; impact loading; reinforced concrete; shear

Date: 7/1/2016

Abstract:
To assess the shear resistance of reinforced concrete (RC) beams under impact loads, a two-mass model is proposed to simulate the dynamic response of RC beams wherein the impact process is divided into two phases: local response phase, and overall response phase. Stress wave propagation effects are taken into account in the local response phase. Using a dynamic failure criterion based on the Modified Compression Field Theory (MCFT), the proposed model evaluates the dynamic moment and shear demand in an RC beam and is capable of assessing the likelihood of shear failure. A comparison between the numerical simulations and experimental results indicates that the proposed model can predict the occurrence of shear failure with reasonable accuracy.